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W. HQGHHAUSBN. ELECTRIC ARC LAMP.

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(No Model.) 5 Sheets-Sheet 2. W. HOGHHAUSBN. ELECTRIC ARG LAMP No. 458,583. Patented June 2, 1891.

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ATTEST! (No ModeI.) 5 Sheets-Sheet 3. W. HOCHHAUSEN.

ELECTRIC ARG LAMP.

No. 453,583. Patented June 2,1891.

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(No-Model.) 5 Sheets-Sheet 4. W. HOCHHAUSBN.

ELECTRIC ARC LAMP. No. 453,583 Patented June 2, 1891.

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' W. HOCHHAUSEN.

ELECTRIC ARG LAMP.

No. 453,583. Patented June 2,1891.

UNITED STATES PATENT OEEICE.

YILLIAM IIOCI'IHAUSEN, OF BROOKLYN, ASSIGN OR TO THE EXCELSIOR ELECTRIC COMPANY, OF NEIV YORK, N. Y.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 453,583, dated June 2, 1891.

Application filed May 28, 1890. Serial No. 353,423. (No model.)

- T all whom, it may concern:

Be itknown that I, WILLIAM I-IOCHHAUSEN,

va citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Electric-Arc Lamps, of which the following is a specification.

My invention relates to the construction of electric-arc lamps and the devices for suspending the same, and involves, among other things, improvements in the feed-regulating appliances, the transfer mechanism for double-carbon lamps, the construction of the feed-regulating magnet, and other details designed to simplify and cheapen the general construction and to insure durability and efficiency in operation.

` My invention consists in pivoting the transfer-lever of a double-carbon lamp upon a support carried by the armature-leverinstead of vupon a fixed support.

My invention consists, also,in other details of construction and combinations of parts more particularly hereinafter described, and then specified in the claims. y

In the accompanying drawings, Figure 1 is a general side elevation of apparatus embodying my invention, the cover-plate of the lamp being shown in vertical section and the lamphorn and conductors broken. away in two for the purpose of making the figure compact. Fig. 2 is a side elevation of the working parts of the lamp, taken on a line at right angles to Fig. l. Fig. 3 is aside elevation of the working parts of a lamp, taken from the side opposite Fig. l. Fig. 4 shows in side elevation the transfer-lever. Fig. 5 is an edge View of a part of the same. Fig. (l is a plan of the upper portion of theI frame within the lampcasing. Fig. 7 isa vertical section through the regulating-magnet of thelamp. Fig. S is a plan of the armature, the clutches, and the ytransfer-lever, the connecting-posts of the lamp and casingbeing shownin section. Fig.

9 is aninverted plan View of the han ger-board.

Fig. 10 is a side elevation of the working parts of the hanger-board. Fig. 1l is an inverted plan View of the cover-plate for the working parts of the lamp. Fig. 12 is a plan of the core and casing of the lampdnagnet. Fig'lfa is a plan view of the working parts supported on the hanger-board. Figs. 14 and 15 show the clutches of the lamp in two positions, respectively. Fig. 6 is a diagram illustrating the circuits and connections of the lamp.

A A indicate the two uppencarbon carriers of a double-carbon lamp.

A is the fixed acting rod or carrier, and A the rod or carrier which is released when the iirst burning carbon has been consumed and its carrier A has fed down to a predetermined point through the intervention of the tripping devices hereinafter described.

B B indicate, respectively, the feed clamps or clutches which engage with the carbon rods or carriers A A. These clamps or clutches are shown herein as consisting of the ordinary ring clamp or clutch that binds the rod and prevents it from feeding whenA said clutch or clamp is tilted, but allows said rod to feed when the clutch is lowered, so that one edge or side of it comes into contact with a releasing stop or surface that causes the clutch to Inove toward a horizontal position.

I-Ieretofore it has been usual to allow the clamp or clutch to engage with a fixed releasing floor or surface, so that at the time of feeding a part of the weight of the carbon rod and other devices sustained by the armature-lever will be removed from such lever and an increased attractive power will be required on the part of the magnet in order to still further lower the clutch and cause a feed to take place. In my invention both the clutch and releasing floor or surface therefor are sustained by the armature of the feedpivoted on a flange C3 of iron, extending from and preferably formed in one piece with an iron casing D2, which surrounds the coils of the feed-regulating magnet and protects'the same from the weather, While at the same time carrying the magnetism from the lower end of the core D3 of such magnet around the outside of the coils up to the armature, thus increasing the attractive effect. The casing D2 of iron extends across the lower side of the coils, and the core Ds is attached to the horizontalportion of the casing or is preferably cast in one piece with such casing, thus producing an iron shell having an annular cavity, such as indicated at D", Fig. 12, which receives the lamp-magnet coils. The core D3 of the magnet has two vertical passages or perforations D, through which extend the carbon rods or carriers. Armature-plate D may carry a piece of iron D7,

forming a short core-piece, extending part way into a central opening in the fixed core D3. This piece D7 gives increased attractive effect or pull upon the plate or lever sustaining the clutches and rods or carriers. Arms D8 extend from the plate D for attachment of retracting or lifting springs, as indicated in Figs. 1 and 3. The iron piece D7 is fastened to the top of the armature-plate D by a screw, as indicated in Fig. 7. The screw also holds in place on said armature a plate of insulating material, as indicated, upon which the clutches B B rest and by which they are ininsulated from the magnet-core. The shell or casing D2 extends up above the fiange or extension C3, as shown more clearly in Fig. 7, and rises on the side opposite the pivoted side of D to a higher point than on the side near the pivot C, thus bringing the magnetism up to the edge of the armature-plate D when the same is lifted or tilted upward to its fullest extent. This vertical extension B9 is cut away, as shown in Figsl and 2, for the passage of the arms DS. The coils of the regulating-magnet may be main or derived circuit coils, or both; or, as in the present instance, one set of coils, as the coarse-wire coil E, may be simply the starting-coil, operated as hereinafter described,while the other coil E2 may be the usualfine-wire coilin aderived circuit around the are. As is obvious, the lamp-magnet might have coils connected into circuit in any other way as found convenient or desirable. The top side of the coil is covered in by insulating material, preferably made water-proof.

F is the trip-lever through which the first burning carbon releases the second burning carbon carried by the rod A. The lever F is pivoted upon the armature of the lamprnagnet, as clearly shown, and has a pin or rod F, rising vertically from it into position to be engaged by a button on the end of the carbon rod or carrier A when the latter has fed down to the point where its carbon is nearly consumed. The tripping-lever F carries, as

indicated more clearlyin Figs. 4 and 5, a hanger l F2, the end of which is bent inward beneath the clutch B so that while the trip-lever is held by its spring Fs in a raised position the clutch B will be tilted, so as to lock t-he carbon rod A and prevent it from feeding down even, though the armature lever or plate D may be pulled down to such an extent as to free the clutch B. lVhen, however, "the first carbon rod A feeds down so as to engage the pin F, its weight depresses the lever F and allows the clutch B to drop down to such an extent as to feed the rod A, which thereupon moves down and brings its carbon into contact with the opposite carbon. The first rod A is left suspended or sustained by the pin F and transfer-lever F, which latter is held down by the weight of A in position so as not to interfere with the movements of the clutch B in regulating the feed of the rod A. Inasmuch as the transfer-lever is also sustained by the armature D, it will be observed that the weight of the rod A will also be sustained by said armature-lever at all times, and there will therefore be no change in the weight upon the armature-lever produced by or in the transfer.

Fig. le shows the position of the clut-ch when the rods A A are held from feeding. The armature-lever D is shown tilted upward to its fullest extent, and the clutch is sustained on one edge and is also tilted, so as to fully lock on the rod. As the armature-lever is drawn down when the are increases in length, it gradually approaches a horizontal position, until finally the clutch assumes the position indicated in Fig. 15,01 a nearlyhori- Zontal position, after which a very slight further movement will allow the feed to take place. In the whole operation it will be seen that the weight of the carbon rod or carrier is sustained entirely by the armature, and there can therefore be at no time any irregularity of operation, owing to the fact that, as in previous constructions, a part of the weight of the rod is necessarily sustained by a fixed support at or just before the time of feeding.

By reference to Figs. 14 and l5 it will be seen that the clutch is normally sustained from a point b on the armature-lever D, and that as the latter descends the surface of the lever between b and the pivotal point of support operates as the releasingfloor, which causes the clutch to assume or approach a nearly horizontal position as the lever descends. This movable releasing-floor, considering the same as distinct from the point or portion b of the lever, at which the clutch is normally sustained, obviously moves at a lesser rate than the point b when the lever D descends, so that finally the clutch b catches up and is released. The simplest way of obtaining this differential movement of the releasing-door and the normal point of suspension or support of the clutch is to pivot the supporting plate or surface which sustains the clutch in such lnan ner that the releasingfloor shall be nearer the fulcrum than the normal point of attachment or connection with said clutch. l do not limit myself, how- IOO ever, tosuch construction, and include as my `invention any combination wherein the releasing-door is sustained by the armature-lever but moves at a lesser rate than the part by which the clutch is normally sustained when locked on the carbon-carrier.

vSupported upon the flange Cs is a frame composed of the plate G and posts C2, which are preferably insulated from the plate C5. The plate C is ofconducting material and Asustains various parts of the lamp, to be presently Amentioned more particularly, among them a magnet G, which controls the circuit thearm'ature D.

net G consists of a plate G3 at the bottom of of the starting-coil E, and a dash-pot G2, the

piston of which is connected at point G3 with The armature of the magcuit of thestarting-coil E. The spring G5 tends to come into contact with a contact or electrode G6, that/isfastened upon the conducting-plate C and is in electrical connection therewith. Theswitchspring G5is sustained on a block of insulating material G7, carried by the plate C. Extending also from the plate G5 and in electrical connection therewith is a spring G8, the free end of which is in position to be struck by the button of the rod A', carrying the second burning carbon, and to be depressed thereby into connection with the plate C or with the plate sustained thereby andvin contact therewith, thus cut:- ting outthe lamp, as will be presently deobvious, forms one electrode or terminal of the lamp-circuit, the block P being in electrical connection therewith. 'Vhen spring G5 is down against .the 'contact G5, which is the condition when the lamp is out of action, the spring G5 is in electrical connection with plate C.. There is also a connection from plate C to the carbon rods or carriers by the usual springs', one of which is indicated at 3, and which bear against the sides of the car- .bon rods or carriers, and by contact of the rods or carriers in their guide frames or plates.

The connections of the coils and magnets are made as follows: Vire L is connected by binding-block 5 to the plate G5and forms one terminal of theeoarse-wire coil E. The opposite terminal of saidcoil (indicated by the numeral 6) yconnects to block N. Vhen the armatureG3 is raised by the attraction of magnet G, the button G'l lifts the spring G5 and breaks the circuit of said coil. The iinewire coil E? is in the derived circuit, o ne terminal of such coil being connected by a wire 7 to the conducting-plates C by being clamped upon the guide-plate A5, which guides the rods A A and is of conducting material and fastened directly upon the plate C. The other terminal of the tine-wire coil connects to the circuit of the coarsewire coil E2 at the side thereof which joins to wire 6, so that the derived-circuit coil is always in a circuit formed from P through C, 7, 6, and terminal N. The coils of magnets G have one' terminal connected by wire 9 with block N, and the other terminal l0 clamped at H upon the upper end of one of the said rods H2 of the lamp, which, after the usual fashion, are in electrical connection with the lower carbon and form a part of the circuit for the current passing through the electric arc. Therefore so long .as the lamp is burning the coils G will be in circuit and the armature G3 raised; but when the lamp is out of operation the armature G3 will fall back. The side rods H2 are preferably covered with insulating material and are fastened at their upper end to the flange C3 and are braced or held in brackets or. lugs H5, projecting from the casing D2 of the magnet-coils at or near the bottom of said casing. A flexible connection 12 also runs from block N to a contact-block H6, which is fastened to a block of insulating' material H7, sustained upon the top of the armature-lever D, and is adapted to make contact with a plate or block H8, which projects from the upper end of one of the said rods of the lamp, as indicatedin Figs. 2 and 8. Vhen the armature is lowered sufficiently by the pull of the derived-circuit magnet-coils to bring the contacts H8 and I-l together, the current will be shunted from the magnet-coils G, which will thereupon lose its power and allow the spring G5 to come into connection with the plate C, thus closing the circuit through the coarse-wire coil by way of 5 and wire 4, which circuit, being of low resistance, forms substantially a low resistance cut-out for the lamp. rlhis contact of the blocks H6 H8 will obviously occur if the are becomes abnormal-ly long and pulls the armature-lever D down sufficiently far. This will obviously occur when the second of the two earbons has been consumed.

To insure the formation of a cut-out circuit, I provide also the spring G5, which, when the rod A has descended to its full extent, will be brought by said rod into contact with plate A5 and C, thus forming the connection from the terminal P to the block 5, and by way of wire i, through the lowfresistance coil, to the opposite terminal N. Should, therefore, the contacts HG HS `or the device controlled thereby fail to establish a cut-out IOO IIO

circuit, the same will be established by the spring GS.

The cover-plate of thc lamp is indicated at I, and is preferably cast in one piece with the horn I2, in which the carbon rods A A are housed at their upper ends. The parts I2 I are also preferably of iron, and the lamp proper is sustained from them by means of the posts I5, which may be cast in one piece with the cover I and extend down to the flange O3, to which they are fastened by screws or other devices. On removal of such screws the lamp may be taken away, leaving the hood or cover I and the horn I2, with other parts supported thereby, in place. The cylindrical casing I2, which protects the Working parts above the regulating-magnet, is sustained in place by springs I4, supported by the iiange C2.

Passing down through the horn are conductors P2 N2, which terminate within the hood or cover I in electrodes or terminals P3 N3, which register with and are adapted to bear upon the spring-electrodes P N', so as to make connection therewith when the lamp is in place beneath the cover I. The electrodes P2 N3 may be either the bared ends of the conductors or wires P2 N2 or may be blocks of conducting material, as indicated in Fig. Il, which are fastened upon across-piece I7 of insulating material, secured to the under side of the cover-plate I and passing across from one side to the other of the plate in line with the lamp-horn. Suitable clamping-screws may be provided in said blocks for clamping the wires or conductors P2 N2 in place. At or near the upper end of the horn or tube I2 the conductors N2 P2 are properly fastened-or secured in insulating-blocks L; but their free upper ends, extending above the lamp-horn and indicated at P2 N4, form electrodes or terminals adapted for connection with spring electrodes or terminals in the hanger-board.

L2 is a plate, formed, preferably, of soapstone, slate, or similar non-combustible insulating material, upon which the parts of the hanger-board are sustained, and which also carries the devices for attachment of the linewires P5 N5.

L2 is a cover for the hanger-board, which cover has its top and sides made continuous or of a single piece of material, preferably so as to be eectually water-tight, and has its sides extending down over the edge of the plate L2 to .form a drip-flange, which will effectually exclude moisture. Posts L4 eX- tend down from the top of the cover L3 and rest upon the plate L2, to which they are secured by screws passing up from beneath. Upon the lower side of the plate L2 is a socket M, adapted to receive the upper end of the lamp-horn I2.

M2 indicates locking bars or levers pivoted on the outside ot' said socket and adapted to to lock beneath projections M3 on the outside of the lamp-horn, near the upper end thereof, so as to hold the parts securely.

On the upper side of the plate L2 are spring contacts or electrodes adapted to receive the electrodes P'1 N4, and composed, essentially, of plates O O, having blocks or contacts O2 O2, between which and the springs O2, sustained by O and pressing toward O2, the terminals Pl N4 are adapted to pass. The plates O O are perforated and the plate L2 is similarly perforated at the proper points to permit the terminals PL N5 to pass up through when the lamp-horn is inserted in the socket and fastened in place. At their lower edge, where the electrodes P'l N* enter, the springs Os OS are bent or inclined, so as to permit easy entrance of the electrodes Pl N". The main-line wires P5 N5 also pass up through openings in the plate L2 and are clamped by suitable clamping devices sustained on the upper side of the plate L2, as indicated at R R, Fig. 13. The conducting-plates sustaining the clamps R also sustain springs R2 R2, and the conducting-plates O O or the blocks O2 O2, as indicated, sustain similar conduct ing-springs R3 R2. These springs R2 R2 R3 R3 are the contact-springs of a cut-out switch, the movable part of which is located on the upper side of the plate L2 within the casing, and consists, essentially, of the two semicircular conducting-plates R4 R2, passing to the edge of a block R5, of insulating material, that is secured to a spindle which extends down through the plate L2, for attachment of an operating-handle R, extending out beneath the edge of the trip-flange for the casing.

Then the parts are in the position shown in Fig. 13, the line-circuit is obviously complete to the electrodes P2 N, and from the same through the lamp. Vhen, however, the cut-ont switch is turned ninety degrees, so as to permit the two springs R2 to rest on one plate R4, it is obvious that the current will be cut off from the lamp and circuit formed directly from I5 to N5 independently of the springs R2 R, which will now rest upon the insulating-spaces or upon the same plate R4, which will not be in electrical connection with either of the springs R2.

Guides or bearings for the two carbon rods or carriers are indicated at A5 A. The first of these A5 is of conducting material and is supported on top of the plate C on the upper part of the frame carried by the flange C2. The lower guide plate or bearing A9 is secured to the bottom of the casing D2 for the rregulator-magnet, but is insulated therefrom. by suitable interposed insulating material, as shown.

For the purpose of holding down the armature-lever and freeing the clutches, so as to permit the carbon-carriers to be moved freely up and down in cleaning or recarboning the lamp, I provide a catch T, adapted to engage with the edge of the armature-lever carried by the spring-seated rod T2, working in a tube T2 on the flange C3. To the lower end of this rod is pivoted a lever T4, having a handle T5, and having its end opposite the handle recessed, so as to receive the rod T2 when the lever T'l is returned to vertical position. The edge of the lever at T6 rubs upon IOC IIO

the lower end of the tube T3 when -the lever is turned, and thereby draws down the rod 'lzff When thelever reaches vertical position, it is held in such position, with the squared end T7 thereof resting against the lower end of the tube T3.

What I claim as my invention isl. The combination, in an electric-arc lamp, of a perforated plate of iron constituting the armature of a magnet and mounted and sustained upon 'lixed pivotal bearings to one side of the vertical line in which the carbon feeds, a ring-clutch sustained loosely on said armature and having an opening coincident with the perforation in the armature, and an electro-magnet beneath said armature for drawing the same down to effect a release of the clutch.

2. In an electric-arc lamp, the combination, with the regulator-magnet, of' a pivoted lever mounted over said magnet on suitable pivots and constituting the armature-lever of the magnet, and a ring-clutch loosely sustained on top of said lever and havinga movable releasing-floor connected to and moving with the lever, which sustains it but at a lesser rate as the clutch is lowered by the pull of the magnet toward position to release.

3. In an electric-arc lamp, the combination, substantially as described, of a pivoted lever or plate, a regulating electro-magnet tending to swing the lever downward, and a ringclutch sustained on top of said lever andhaving its point of connection with the lever, where it is normally sustained thereby in position to engage and hold the carbon, and its releasing point or floor carried also by said lever, located at different distances from the pivotal point of support of the lever, the releasing-point being nearer the f ulcrum or pivot, so as to move at a slower rate than the point by which the clutch is normally sustained.l

4. In an electric-arc lamp, the combination, with the regulator-magnet through which the carbon-carrier passes vertically, of an armature mounted over said magnet on suitable pivots and a ring-clutch loosely sustained on top'of said armature, so as to be capable .of tilting upon it, as and for the purpose described.

5. In an electric-arc lamp, the combination, with the regulator-magnet through which the carbon-carrier passes vertically, of an armature perforated, as described, and mounted on a fulcrum at one side of the carrier, and a tilting ring-clutch resting on bearings on top of said plate in engagement with the carboncarrier and adapted to tilt independently of the armature.

6. The combination, in an electric-arc lamp, of a regulator-magnet through the axis of whose coil the carbon-carrier plays vertically, a disk or plate armature perforated and sustained upon a fulcrum to one side of the carbon-carrier, and a ring-clutch resting on bearings upon the top of said plate-armature.

7. In an electric-arc lamp, a regulating-magnet depending below the casing, and the plate or support sustaining the working parts of the lam-p,in combination with an iron waterproof jacket for said magnet, forming a magnetic extension from the lower end or pole thereof to the opposite end, where it. is in close proximity to the armature of the magnet, as and for the purpose described.

8. In an electric-arclamp,a regulator-magnet having a core perforated for the passage of the carbon rod or carrier, in combination with an exterior protective iron shell connected with the core at one end and extended around over thc coils to form a weather protection therefor up to the opposite end of the magnet, in combination with a plate-armature pivoted in the iield of the core and having its edges in close proximity to the upper end of said shell, so that the shell and plate may serve to carry the magnetism 'from the one pole around to the opposite pole of the magnet, as and for the purpose described.

9. In an electric-arc lamp, the combination, with the regulator-magnet coils, of a cast-iron shell having a perforated core cast in one piece with it and open at its top end only to permit the coils to be inserted, a carbon-carrier passing axially through the core, and a clutch-supporting armature sustained upon the shell and over the coils, as and for the purpose described.

10. A magnet-core and shell for the regulating-magnet of an arc lamp, consisting of a central iron core-piece having one or more longitudinal perforations, an exterior cylindrical portion, and a connecting part over the portion of the coil exposed to the weather, in combination with a flange near the top of the Shell and an armature and feed-regulating mechanism sustained by said ange over the magnet, as and for the purpose described.

11. The magnet having a disk orplate armature sustained over the same by pivots located at one side and provided with an exterior iron casing extended longitudinally at the side opposite the pivots to a level above the same, as and for the purpose described.`

12. A regulator-magnet having an iron casing upon its exterior provided with a laterally-extending flange or plate near its top integral with said casing and forming the baseplate or support which carries'the working parts of the lamp, in combination with a casing sustained on said flange, and lamp side rods attached to and depending from the same, as and for the purpose described.

13. In an electric-arc lamp, the combination, with a regulator-magnet having its axis vertically disposed and provided with a vertical passage for the carbon rod or carrier, of an exterior iron protective case forming a carrier of magnetism from the lower end of the magnet to the upper end thereof, a flange formed on such case, a perforated pivoted armature pivoted in supports on said flange and having its edges in close proximity to the upper edge IOO IIO

IIS

ISO

ot the iron protective case, and lamp side rods also sustained by and depending from said flange.

14. The combination,in an electric-archi mp, of a regulator-magnet through which the carbon-carrier passes vertically, an iron easing for the magnet-coils, forming a carrier of magnetism from one end to the other thereof, as 4well as a weather-protective case, a lateral flange or plate extending from the casing between its ends, a frame sustained thereby over the magnet, guides or bearings for the carboncarrier, supported, respectively, on said frame and at the lower end of the iron casing, and a perforated pivoted armature carried by the fiange and having its edges in close proximity to the edges of the iron casing, as and for the purpose described.

15. In a double-carbonlamp, a trip or trans-` fer lever supported on the feed-regulating and carbon-sustaining lever, as and for the purpose described.

16. The combination, with the carbon-car- -riers and their clutches sustained wholly by the magnet, of the transfer-lever also sustained by said magnet.

17. The combination,in an electric-are lamp, of two carbon-carriers, the ring-clutches therefor sustained on a vertically-movable armature-plate, and a transfer-lever engaging with one of said clutches and provided with a spring for normally holding the clutch in engagement with its carbon-carrier, as and for the purpose described.

18. The combination, in a double-carbon lamp, of a vertical regulator-magnet through which the two carbon-carriers are fed, an armature-plate sustained over said magnet and provided with perforations through which the carbon-carriers pass, clutches .supported on the top of said plate and engaging, respectively, with said carriers, and a transfer-lever also pivoted on said plate and connected with one of said clutches, as and for the purpose described.

19. The combination, in an electric -arc lamp, of a feed-regulating magnet, two carbon-carriers passing vertically through said magnet, an armature-lever sustained over the magnet and cut away to form openings for the passage of the carbon-carrier, feed-regulating devices sustained on top of said armature, and a trip or transfer lever also sustained by said armature-lever, as and for the purpose described.

20. The combination, in an electriearc lamp, of a feed-regulating magnet having an exterior casing of iron provided with a flan gc, lamp mechanism sustained on said flange over the magnet, a lamp-horn and top plate cast in one piece, and posts uniting said top plate and fiange, as and for the purpose described.

21. The combination, in an electric arc lamp, of the lamp-magnet having the laterally-extendin g flange projecting from its iron casing, a frame sustained on such flange and carrying electrodes to which the working parts of the lamp are connected, alamp-horn and cover-plate united together, means vfor uniting said cover-plate and flange, and electrodes covered by the cover-plate and horn and adapted to engage with the electrodes Within the lamp when the parts are secured together, as and for the purpose described.

22. In an electric-arc lamp, the combination of the cover-plate andhorn, a lamp-frame carrying the working parts of the lamp and detachable therefrom, and electrodes sustained by the lamp and by the cover-plate or horn, respectively, and adapted to register with one another, said electrodes forming, respectively, the terminals of the line and of the lamp mechanism, as and for the purpose described.

23. An electric-arc lamp having a coverplate and horn formed of iron cast in one piece and provided with posts extending down for attachment of the base carrying the workin g parts ot' the lamp.

24. In an electric-arc lamp, leading wires or conductors housed within the lamp-horn and terminating at the top and bottom of the horn, respectively, in contacts or electrodes adapted to engage, respectively, with contacts within the lamp-easing and with contacts or electrodes on the hanger-board.

25. The combination, in an electric-arc lamp, of the lamp-horn, the conductors within the same, clamps for fastening said conductors at the lower end of the horn or chimney, spring-electrodes carried by thc lamp-frame and in position to be engaged by the lower ends of such conductors, clamping devices at the top of the horn for holding such conductors at the opposite end, and a hanger-board provided with spring-electrodes adapted to receive the bared upper ends of said conductors.

2G. ln an electric-arc lamp, the combination, with the vertical lamp-magnet havin-g an exterior casing of iron provided with a fiange cast in one piece therewith,of a lamp-horn, cover-plate, and vertically-depending posts all cast in one piece, said posts being adapted to connect the cover-plate and flange, as and for the purpose described.

27. The combination, with thelamp-nlagnet and its exterior casing provided with a laterally-extending flange at or near the top of the casing, of the depending side rods carrying` the lower-carbon holder and bolted to said flange, and the lugs or'projections at or near the bottom of the magnet-case and through which said side rods pass.

28. Tie combination of the lamp-magnet having an exterior iron casing provided with a fiange, as described, of a frame sustained on such flange, spring plates or electrodes having horizontal spring-terminals sustained on such frame, a lamp chimney or horn extending upward from the cover-plate and containing conductors which terminate within the cover in electrodes or terminals adaptedV to ICC IIO

engage with the spring-electrodes carried by the frame, and means for detachably fastening the flange and cover-plate together.

29. The combination, in an electric-arc lamp, of the vertical lamp-magnet provided with the exterior iron casing and flange, magnet-coils within such casing connected, respectively, into a derived circuit around the arc and into a starting circuit or branch, and a switch mechanism controlling such starting-circuit and sustained by a frame supported on the flange.

30. The combination,in an electric-arc lamp, of a magnet having a starting-coil and provided with an iron casing and flange, ot' a magnet supported on a frame sustained by the tlange, a movable core for said magnetcoils, an iron plate at the lower end of the core, and a switch in the starting-circuit sustained above the magnet and operated by said core.

31. The combination, with the regulatingmagnet for an arc lamp, of an iron protective casing surrounding the coils thereof, a tlange near the'upper end of the casing forming the bottom plate of the lamp, a casing for the working parts of the lamp sustained by said flange, a cover-plate, and posts uniting the same to the flange.

32. The combination, with thelamp hangerboard having spring-electrodes and means for connecting the same wit-h the line-terminals, of Wires or conductors housed within the lamp-horn and adapted to engage with the electrodes on the hanger-board when the horn is locked to the board.

33. In ahanger-board for electric-arc lamps, a disk or plate of slate or similar non-cornbustible insulator having on its bottom surface a socket adapted to receive the lamphorn, means for locking the horn in position, conductors passing down through the lamphorn and terminating at the upper end thereof, openings in the hanger-board plate, located w-ithin the socket in position to receive the bared ends of such conductors, and springelectrodes on the opposite side of the plate for engagement by such conductors when the horn is locked .in position.

34. The combination, with a hanger-board plate of insulating material, of a metallic socket on its lower side adapted to receive the upper end of the lamp-horn, spring-electrodes on the oppositesideof the plate, adapted to be engaged by conductors passing down through the horn when the horn is locked in position, a cut-out switch located on the upper side of the hanger-board plate, and a vertical spindle carrying said switch and provided below the plate with an operatinghandle.

35. The combination, in a hanger-board for electric lamps, ot a plate ot' slate or similar insulator, au unbroken casing covering the parts on the top side oi said plate and extending down over the edge to form a dripflange, a rotary cut-out switch located within said casing, a spindle or rock-shaft extending vertically through the plate, and the laterallyextending handle below the plate connected to said spindle.

3G. The combination, substantially as described, of an electric-arc lamp having contact terminals or electrodes forming the terminals of the lamp-circuits, a lamp-horn sustaining the electrodes adapted to engage with those in the lamp and connected With the hanger-board, means for detachably fastening or sustaining the lamp from the horn, a cut-out switch located on the hanger-board,

and means for connecting the line-wires to A,

blocks or plates on the hanger-board.

37. A hanger-board for electric-arc lamps, comprising a disk or plate of non-combustible insulator, a socket on the lower side thereof adapted to receive the lamp-horn, line or binding posts on the upper side of the plate, located in position to register with vertical openings, through which the line-wires may be passed from beneath, spring-contacts connected with said posts and forming terminals of a cut-out switch, spring sockets or electrodes located over the socket for the lamphorn and adapted to be engaged by conductors carried by the horn, and spring-contacts connected with said sockets or electrodes and forming other terminals of the cut-out switch.

38. In a hanger-board for electric lamps, spring-contact sockets sustained on suitable conducting plates or blocks fastened to the top of an insulating-plate, and contact-springs extending from such blocks or plates and forming terminals of a cut-out switch, located also on the plate.

39. The combination, substantially as described, ot the slate-base, the spring contacts or electrodes adapted to be engaged by conductors leading down to the lamp, a pair of contact-springs sustained, respectively, iu electrical connection with the said sockets, another pair of contact-plates connected to binding posts or blocks upon the top side of the insulating-plate and adapted to form. lineterminals, and a rotary insulating disk mounted on a vertical spindle running down through the plate and carrying two conducting-arcs, as and for the purpose described.

Signed at New York, in the county of New York and State of New York, this 22d day of May, A. D. 1890.

" WILLIAM HOCHHAUSEN.

Vitnesses:

WM. H. CAPEL, HUGO KonLKER.

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